采用Vuforia AR库定制型号的SceneKit

Question

我是SceneKit的新手，使用swift 3和最新的Vuforia库6-2-9。

我在自定义3D模型上应用textures时遇到了问题。

fileprivate func createDefaultMarkerScene(with view: VuforiaEAGLView) -> SCNScene {
    let scene = SCNScene()

    let lightNode = SCNNode()
    lightNode.light = SCNLight()
    lightNode.light?.type = .omni
    lightNode.light?.color = UIColor.lightGray
    lightNode.position = SCNVector3(x: 0, y: 0, z: 1000)
    scene.rootNode.addChildNode(lightNode)

    let ambientLightNode = SCNNode()
    ambientLightNode.light = SCNLight()
    ambientLightNode.light?.type = .ambient
    ambientLightNode.light?.color = UIColor.darkGray
    scene.rootNode.addChildNode(ambientLightNode)

    let geoNode = SCNNode()
    geoNode.name = "model_model"

    let normalsSources = SCNGeometrySource(normals: normalsSCNVector3)
    let verticesSources = SCNGeometrySource(vertices: verticesSCNVector3)
    let texCoordsSources = SCNGeometrySource(textureCoordinates: texCoordCGPoint)
    let indicesElements = SCNGeometryElement(indices: indices, primitiveType: SCNGeometryPrimitiveType.triangles)

    geoNode.geometry = SCNGeometry(sources: [verticesSources, normalsSources, texCoordsSources], elements: [indicesElements])
    geoNode.position = SCNVector3(x: 0, y: 0, z: 0)
    geoNode.scale = SCNVector3(x: 50, y: 50, z: 50)

    let material = SCNMaterial()

    material.diffuse.contents = UIImage(named: "grad_ao.png")

    geoNode.geometry?.firstMaterial = material

    scene.rootNode.addChildNode(geoNode)

    return scene
}

模型被正确渲染，但应用的纹理完全混乱。我已经尝试了旋转图像，也uv坐标都ok 0..1。

有什么想法吗？谢谢

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Answer 1

我已经设法fix了一个问题。

密钥在"texture.png“文件中。

我只需要将图像翻转180度：

material.diffuse.contentsTransform = SCNMatrix4Translate(SCNMatrix4MakeScale(1, -1, 1), 0, 1, 0)